I know you directed this at William, but I'd like to provide some direction.

You can only play the things that you've learned, worked on or that are in your current skill set.  That's all any of us can do.  

So, what do you want to be able to do?  You might want to make a list & prioritize your goals.

The fundamentals lessons are designed to help students build skills from zero.  After that you've got to apply those skills to the next step.  Pick a direction, then learn more skills and apply them to songs.  

Do you want to learn a specific song?  Start working on that song.  Look for songs at your skill level.  If you encounter skills in a song that you don't yet possess, then start working on building that skill.

You've mentioned the pentatonic boxes and major and minor scales in a few posts. You can use those scales in so many different ways and at so many different levels that it's difficult to answer without knowing the specific skill level, preferred style or goals of the individual asking the question.

It really depends on where you are and what you want to do.

You can do simple things with the pentatonic scale and basic major scales like this:

https://www.guitartricks.com/lesson/16008

And you can do things that a little more involved like from these tunes.

https://www.guitartricks.com/lesson/22545

https://www.guitartricks.com/lesson/19525

Or you do much more advanced things with the pentatonic scale like this:

https://www.guitartricks.com/tutorial/2458/

It's in the main riff and all over the solo.  But it's a more advanced skill set.

So, what do you want to do that you can't yet?